Upstream implement for combined harvester-thresher for harvesting soybeans and peas

ABSTRACT

A front-mounted attachment ( 2 ) for harvester-threshers ( 1 ) for harvesting soy-beans and peas has a resiliently mounted additional cutting mechanism ( 4 ), whose cutter drive ( 5 ) can be derived from the drive of the cutting mechanism of the harvester-thresher ( 1 ). To ensure a simple and trouble-free operation, the cutter drive ( 5 ) includes an oil-bath transmission ( 6 ) to be connected to the drive of the cutting mechanism of the harvester-thresher ( 1 ) via a belt drive ( 7 ), which oil-bath transmission is mounted on a lateral runner ( 8 ) pivotally mounted at the cutting mechanism ( 10 ) of the harvester-thresher so as to be swivelled about a horizontal transverse axis (A) by a swivel arm ( 9 ).

This invention relates to a front-mounted attachment for harvester-threshers for harvesting soybeans and peas, comprising a resiliently mounted additional cutting mechanism whose cutter drive can be derived from the drive of the cutting mechanism of the harvester-thresher.

To be able to use grain harvester-threshers also for harvesting soybeans and peas, there are special front-mounted attachments with own additional cutting mechanism are provided, which front-mounted attachments are attached at the cutting mechanism of the harvester-thresher and are connected with the drive of the cutting mechanism of the harvester-thresher. So far, however, the drive connection between the cutter drive of the additional cutting mechanism and the drive of the cutting mechanism of the harvester-thresher includes push rods and similar lever mechanisms, which is complicated and frequently leads to malfunctions.

It is therefore the object underlying the invention to create a front-mounted attachment as described above, whose cutter drive involves a functionally reliable operation of the additional cutting mechanism with a simple coupling to the drive of the cutting mechanism of the harvester-thresher.

This object is solved by the invention in that the cutter drive as an oil-bath transmission to be connected to the drive of the cutting mechanism of the harvester-thresher via a belt drive, which oil-bath transmission is mounted on a lateral runner pivotally mounted at the cutting mechanism of the harvester-thresher so as to be swivelled about a horizontal transverse axis by means of a swivel arm. The oil-bath transmission provides for a safe, largely maintenance-free cutter drive of the additional cutting mechanism, and by means of the belt drive it can easily be coupled to the drive of the cutting mechanism of the harvester-thresher, for instance to the oil-bath transmission provided for this drive of the cutting mechanism. The support by means of the runner ensures a support of the oil-bath transmission which can be moved together with the resilient additional cutting mechanism, so that there is obtained a perfect drive connection between the oil-bath transmission and the cutter bar or the like of the additional cutting mechanism.

In the drawing, the subject-matter of the invention is illustrated purely schematically, wherein:

FIGS. 1 and 2 represent a top view and a side view of a front-mounted attachment in accordance with the invention.

For harvesting soybeans and peas, a front-mounted attachment 2 is attached at a schematically indicated harvester-thresher 1, which front-mounted attachment has an additional cutting mechanism 4 resiliently mounted via spring plates 3. The cutter drive 5 for the additional mechanism includes an oil-bath transmission 6, which via a belt drive 7 is in drive connection with the drive 13 of the cutting mechanism 10 of the harvester-thresher 1. Driven screw conveyor 12 drives main cutting mechanism 14. Belt drive 7 connects drive 13 with drive 5. The oil-bath transmission 6 is mounted on a runner 8, which is pivotally mounted at the cutting mechanism 10 of the harvester-thresher 1 so as to be swivelled about a horizontal transverse axis A by means of a swivel arm 9, where in addition to the support and coupling of movements there is provided a resilient mounting 11 between cutting mechanism 10 and runner 8. 

What is claimed is:
 1. A front-mounted attachment mounted on a cutting mechanism of a harvester-thresher for harvesting soybeans and peas, comprising (a) a resiliently mounted additional cutting mechanism, (b) a drive for the additional cutting mechanism, the drive comprising (1) an oil-bath transmission and (2) a belt drive connected to the oil-bath transmission, (c) a lateral runner whereon the oil-bath transmission is mounted, and (d) a swivel arm pivotally mounting the lateral runner on the cutting mechanism of the harvester-thresher for swivelling the lateral runner about a horizontal transverse axis. 